Device for finishing the soles of shoes



Nov. 21, 1939. c. l lABER El AL Z.180,807

DEVICE FOR FINISHING THE SOLES OF SHOES Q Filed Oct. 8, 1937 3 Sheets-Sheet 1 6 #50. man) Zwen 10h Nov. 21, 1939.

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{ c. HABER ET AL DEVICE FOR FINISHING THE SOLES OF SH Filed 001;. 8, 1937 3 Sheets-Sheet 2 Patented Nov. 21, 1939 UNITED-P STATES DEVICE FOR FINISHING'THE soLEsoF SHOES I Christian Haber, Hechingen, and Ernst Haumann, Stetten, near Hechingen," Germany Application October 8, 1937-,1-Serial No. 168,058

In Germany October 14, 1936 10 Claims. (01. 12-17) This invention relates to a device for finishing the soles of shoes, andhas for its object to carry out the levelling process forming: thelast stepin finishing in a novel manner simultaneously with the closing of the channel andthe setting .ofthe soleedge ina single operation by a machine combining. all the tools. required for the various. operations. In the mechanical; production of shoes the problem of levelling the .soles has not been solved as yet in a satisfactory way, and the known methods and devices for this purpose are open to serious objections which the trade has been trying to overcomefor alongtimea All knownlevelling devices require the use of molds which mustbe specially constructed for each type of last in at least two sizes.

The machine according to the invention elimi-.

nates all thesadrawbacks and makes it possible iorthefirst time to carry out levelling without using metal or wooden lasts .and metal .molds.

Furthermore,v the invention permits levelling simultaneously with channel closing and edge laying in one operation by combining in one and the same machine the levelling tools with the tools for closing the channels and laying the sole edge insuch manner that they operate automatically'in positive dependence upon one another.

-,The simultaneous carrying out of the auxiliaryopera-tions of channel closing and edge lay-, ing by means .of a roller closing the lip and feeding the 'workand of a hammerlike laying tool is known. It has further been'proposed to provide devices of :this class with. a work. carrier for sup porting the work against the vertical pressure exerted by the channel closing roller at the seam and; simultaneously, for taking up the impacts due ,to the beatings. of the setting hammer occurring transversely thereto, and also with a lip ;layer arranged in front of the closing roller.

These devices serve, however, solely for performing the auxiliary operations of channel closing-and edge laying, which,.according to the invention, are combined with the main levelling operation of the newdevice merely in a supplementary manner, so that the new combination.

represents a novel universal sole finishing machine.

In contradistinction to all known levelling de- .vices the new machine makes allowance in a perfectly simple and safe manner forv different working of the sole in the shank and outer bottom portion, as required in levelling, and can further be adapted to any shoesizes without the least 55 trouble and withoutthe use of lasts'or molds" and even permits special handling of particularly delicate products.

Besides those mentione d,the invention aifords. other advantages which are pointed out in the.

60. following specification with reference to .the. ac-.

companying, drawings, in which Figure 1 is a side view of the device, partly in section; Fig. 2, a top view. ofthe machine head; Fig. 3, a vertical section on an enlarged scale showing the working too-ls arrangedin themachine head; Fig. 4, a detail view'cnran enlarged scale of the work carrier; and Fig. 5, a-detail view of an operating lever.

Referring, to the drawings, the machine comprises a stand {which supports the machine head on a bearing l5, and a horn-shaped work carrier it provided With'a work receiving plate 9 which ispreferably rotatable, on ball bearings.

"The memberlil can be lowered in usual manner, for instance by means of a foot lever, not

shown, against the pressure of a spring tending to force it up.

The-machine -head 24 rests on a slide plate 12' which is arranged on thestandard l andon which themachine head 24 by means of the hand wheel 2| andthe spindle guide 16 can be moved in the direction of the shoe or away from the latter by, means of the block 15 engaging the head and running on thespindle. I

v The machine-headtfl supports at itsrear end the driving motor 2 which ,drives the pulley 4 by thebelt Thepulley l acts by means of a worm, etc., not shown, on a worm wheel arranged on the main driving shaft, not shown. r

The driving;shaft.carries at its front end a roller which is"subdivided-several times to form a plurality of different discs ofwhich four are shown: Only; oneiofthe middle discs 8 is driven, andtheother discs 8 8 and 8 arerotatably :disposed on-the shaft by means of the ball bearings 68; 1 1

.This roller "asrshown is of cylindrical form, though itjmaynalso be ,of conical, concave or convex shape; The driven disc or roll 8 is preferably fluted and serves for feeding the work, of; which only the shoe sole is shown in Fig. 3 through the gap between the disc and the work carrier over the channel lip. The loosely disposed discs have preferably a smooth surface.

I Below the roller 8Tand parallel to the surface thereof "'a setting hammer or beater H is positionedwhich is operated by the cam shaft l3.

' The 'camf shaft is driven bya'belt M which passes mer .I-l works in thedirection of the surface line.

of ,the pressurezrolleri'8 the. hammer 53 applies thelsame numberhofablo'ws upon the seamfrom below in vertical direction. This operation is carried out also through the medium of the cam shaft I3, since during the advance of the hammer 63 in a manner to be described below a cam stop 61 at the rear end thereof moves within working range of the cams which thus apply the same number of blows received by the laying hammer It to the rear end of the hammer 64. As the hammer 63, 64 is inclinable on the member I8, the downwardly acting blows of the cam are converted into blows applied to the seam from below in vertical direction by the exchangeable pointed end 63 of the hammer. The spring 69 or the support controlled thereby which is secured to the base plate of the displaceable head 24 tends to lift the rear end of the hammer 63, S4 and to return it to the cam path. The spring 93 serves for cushioning the hammer 63, 64 to compensate for irregularities in the width of the sole edge. The working point of the hammer 63, 64 shown in Fig. 3, possesses two angularly disposed surfaces one of which is arranged horizontally in working position and the other one at an angle thereto.' In this manner, accurate meeting of the seam and working groove is insured and the hammer is further prevented from touching any outsole stitching or edging. To permit working of soles of any size and thickness the hammer '63, 64 can be adjusted in vertical direction.

A particular feature of the invention is that the hammer 63, 64 during working of the shank is automatically stopped or started when the edge of the sole is to be treated.

This purpose as well as another one to be explained below is served by the movable arrangement of the entire machine head 24 which is disposed between guide members I9 firmly connected with the machine stand I and united by a covering plate 69, as shown in Fig. 1. The guide members I9 possess guide curves, indicated by dotted lines, along which the slide plate 12 carrying the machine head and provided with corresponding guide projections can be swung. This motion is carried out about a horizontal axis a which passes through the center of the lower surface line of the driven pressureroller disc 8*. During the swinging motion this point retains its position, that is, the tilting of the machine head about the axis passing through it does not produce an increase or reduction of the pressure acting upon the work located between the horn I9 and the roller 8. Only the outer loosely disposed rolls 8* 8, 8 are moved during the passage from oblique into horizontal position, which occurs simultaneously with the transition from shank working to that of the flat sole portion, into a position adapted to the plane of the sole against which they continue to abut.

The machine head 24 is tilted by means of a bar 82 which is actuated by a knee support 85, shown in detail in Fig. 5, and which is fitted at its end with a rack gear which acts on a gear wheel 89. The gear wheel 89 is internally threaded and engages the threads of the rod I9 so as to move the link TI which is pivotally connected to the rod I9 as indicated at 78. The other end of the link I! is connected to the slide plate I2 at M so that the machine head may be tilted by actuation of the member 85. The gear wheel 89 is rotatably mounted and retained against axial movement by the bracket 8I which is secured to the frame I. Two set screws 92 permit instantaneous adjustment of .the lower and upper limit of this lifting motion relative to one another.

To reduce the expenditure of energy required for lifting the machine head to a minimum a counterweight 88 is provided which is suspended from an eye 99 of a rope 89 which passes. over pulleys 86, 81 and secured to the link 11 at 99.

. Through a special coupling of the hammer 63, 64 with the fixed guides I9 of the stand I the hammer will be inoperative when the machine head 24 is inclined and thus in a position for working the shank. The hammer is articulated at IS'I' to the control lever 61 secured at 61 to the member I9, and the arrangement is such that at horizontal position of the machine head 24 the point 63 of the hammer 63., 64 is located exactly vertically under the point of the hammer I I, though this position can of. course be adapted to other angular positions of the machine head by displacement of the pin 61 Whenthe machine head 24 is tilted out of the inclined position shown in Fig. 1 into horizontal position, the previously withdrawn hammer is moved forward by the link 61 and thus passes with its rear cam 61 within range of the cam shaft I3, whereby the vertical swinging motion of the hammer is started and thus the corresponding action on the edge of the work.

Another essential feature for attaining the full effect of the new device is the special construction or operation of the horn-like work carrier. The work carrier is preferably heated as in other types of shoe machiney, such as sole sewing machines. Current is supplied for this purpose by the conductors 59+ and 59- which are in sliding contact with the separately insulated members 46+ and 46- of the sleeve 98 through the inside of which a conductor connecting with the member 46+ is passed to which the heating device of the horn I9 is connected while the return line is represented by the sleeve 98 itself.

A shaking motion is imparted to the work carrier, particularly if shoes are to be worked which like orthopedic ones have an insole requiring special treatment, such as underlaid rubber fabrics, etc. This motion prevents the insole from getting out of proper position, as the support, as it were, merely jumps over it.

For this purpose the horn guiding bearing 91 is provided, as shown in Fig. 4, which is arranged in the horn bearing I5 and can move only up and down. In the bearing 91 moves the bushing 98 which rotatably supports the horn I9. The springs 96 press the bearing 97, the bushing 98 and the horn support I9 against the work. The extension of the horn which is non-displaceable in the bushing 98 and secured by the nut I96 is connected with the eccentric I92 by the member I99 and the connecting rod ml. The eccentric I92 is driven by a shaft I92a and a groved pulley I93 or the like from a suitable power source. The shaft I92a is provided with a collar I95 for preventing axial movement thereof. The rod I94 is provided for establishing a connection to the foot lever adapted for raising and lowering the horn. The extension 91 of the guiding bearing 9''! supports the eccentric shaft. The bearing 9! is displaceable relative to the bushing 98 to a somewhat greater extent than the stroke of the eccentric. When the horn I9 is under pressure against the shoe and the eccentric I92 moves, the counter-pressure of the springs 96 will be quickly eliminated, so that the horn is relieved from spring pressure and the resulting increasing and decreasing pressure imparts a jolting motion to it. The cam shaft is preferably driven at a speed of approximately 3,000 revolutions per minute.

The machine functions as follows:

Assuming that a shoe having a half-round shank and plane bottom with broad double sole edge is arranged in the apparatus the machine is first adjusted once and for all to a certain tilted position which in the example assumed involves an inclination of eight to zero degrees relative to the horizontal.

When work is to start on the shank, the machine at the beginning of operation is in the position shown in Fig. 1, or the cylindrical feed roller is positioned at an angle of 8 relative to the horizontal while the hammer 63 is withdrawn by the link 6'! and thus outside the sphere of action of the cam shaft l3. The shoe is placed on the horn carrier, previously pressed down by foot lever, and elastically pressed by it against the feed roll 8 The heated support irons the seam under pressure.

Before the working gap is reached, the lip layer 25 driven by the pulley 30 and the belt 33, Fig. 2, brings the channel lip within working range of the pressure roller which presses the lip and levels it while the hammer ll beats the channel edge. edge has passed through the gap, the operator tilts the machine head and thereby the feed roller into horizontal position by actuating the bar 82, At the same time, through themedium of the link 67, the rearward cam projection of the hammer 63 is brought within range of the.

cam shaft and starts beating in vertical direction. The shoe is guided in horizontal position through the working gap, and the loose .rolls 8, 3 serve as abutments for it. When working has progressed to the shank again, the machine head is moved to an inclined position, etc.

The distance of the hammers II and 63 from the sole and edge can be rapidly adjusted by means of the spindle 39. The rapid adjusting means for limiting the tilting motion, which need be fixed only once for each line of manufacture, includes the screws 92 for limiting the stroke of the bar 82.

The arrangement of loose rolls in addition to the driven roller portion, whereby a perfectly plane bottom is produced, prevents also any braking effect of the roller, as the rolls are independent from one another with respect to circumferential speed.

By adjusting the tilting angle any desired adaptation to shank and sole working can be effected, and a manufacturer is in a position to produce at will any type of bottom, from straight to curved, and also a corresponding shank.

It is to be further noted that the tilting of the machine head permits automatic removal of the two hammers from the work according to the requirements of a wider sole distance from ball to ball.

The invention is not limited to the embodiment shown and described, but may be varied in many respects without deviating from. its fundamental idea. If the machine is to be used only for levelling, both hammers and the lip layer could be dispensedwith but the employment of a swingable levelling roller would still represent an independent invention.

Furthermore, the relative position of the two hammers may be so altered that in tilted position the hammer 63, 64 projects somewhat be- When the shank portion of the yond the hammer I l or the hammer 63, 64 may be permanently disengaged if required. The shaking motion of the horn can also be disconnected.

We claim:

1. Apparatus for finishingthe soles of shoes comprising in combination, a frame, a springsupported work carrier, a machine head tiltably mounted on the frame, a roller rotatably mounted on the head so as to evolve immediately above the sole of a shoe supported on the work carrier, means for tilting the machine head relative to the machine frame, and means for guiding the machine head so that during the tilting thereof the machine head turns about an axis defined by a tangent of the roller.

2. Apparatus according to claim 1 wherein the machine head is arranged to be tilted so as to swing about an axis which extends tangentially through the center of the lower surface of the roller.

3. Apparatus according to claim 1 wherein the roller is positioned at one end of the machine head, and the guide means comprises arcuate shaped members for guiding the tilting movement of the head.

4. Apparatus according to claim 1 wherein the means for tilting the machine head comprises a link member pivotally connected to the head, and means carried by the frame for longitudinally movingsaid link.

5. Apparatus according to claim 1 wherein a driving motor is disposed on the tiltable head.

6. Apparatus for finishing the soles of shoes comprising in combination, a frame, a springsupported work carrier, a machine head tiltably mounted on the frame, a driven roller carried by the head so as to rotate adjacent the sole of a shoe supported on the work carrier, a hammerlike laying tool carried by the head and mounted to move in the direction of the lower surface line of the roller, a second hammer-like tool movably mounted on the head to strike the welt edge of the shoe, and a cam shaft for actuating both of said hammer-like tools.

7. Apparatus according to claim 6 wherein means is provided for guiding the tilting movement of the head, and the second hammer-like tool is coupled to the guide means in such a manner that the second tool is disengaged from the,

which the work carrier presses the shoe, tiltable means supporting said roller which during working of the shoe sole is arranged in a level position and during working of the shoe shank is tilted in accordance with the inclination of the surface of the shank.

9. Apparatus according to claim 8 wherein the roller comprises a plurality of individual discs mounted on a common shaft with one disc coupled to the shaft, and the other discs rotatably arranged on the shaft.

10. Apparatus according to claim 8 wherein a hammer-like laying tool acting in a lateral direction upon the work is associated with the roller, a hammer-tool simultaneously acting. in an upward direction on the shoe sole edge, and a lip layer disposed in front of the working gap.

CHRISTIAN I-IABER. ERNST HAUMANN. 

